Found the Web ordering page a minefield so contacted customer service with window type. Spoke to Samantha (who is a Jem, hang on to her) who sent some samples out and told me what I needed to order. Sample chosen so come to order, another minefield, so many drop down menus, I might be me an old git, but I don’t think so! Ring again, Samantha again (praise the lord) said I had to order on line to get postage deal. I needed three the same. Walked me through the ordering process job done! Blinds arrived a day early, great all safe & sound! Installation proved I can no longer read a comic as after ringing customer service, putting phone on video another helpful lady told me I was facing the wrong way, up 8ft steps in the blazing sun! The electric windows are 5yrs old and could I locate the power pick up from the instruction? Your right! Another phone call to a helpful guy this time who sent me a video link. At last all working and fine. So all in all a good product with one of the best after service help lines I’ve come across. Once you have fitted one it’s a breeze.